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author | Haoyi Li <haoyi@haoyi-mbp.corp.dropbox.com> | 2014-11-26 00:45:31 -0800 |
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committer | Haoyi Li <haoyi@haoyi-mbp.corp.dropbox.com> | 2014-11-26 00:45:31 -0800 |
commit | 2c4b142503bd2d871e6818b5cab8c38627d9e4a0 (patch) | |
tree | 6ba33d2980a1a7a1286100202a695c6631bd240e /javalib/src/main/scala/java/io/ByteArrayOutputStream.scala | |
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Squashed 'examples/scala-js/' content from commit 47311ba
git-subtree-dir: examples/scala-js
git-subtree-split: 47311ba693f949f204f27ea9475bb63425fbd4f3
Diffstat (limited to 'javalib/src/main/scala/java/io/ByteArrayOutputStream.scala')
-rw-r--r-- | javalib/src/main/scala/java/io/ByteArrayOutputStream.scala | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/javalib/src/main/scala/java/io/ByteArrayOutputStream.scala b/javalib/src/main/scala/java/io/ByteArrayOutputStream.scala new file mode 100644 index 0000000..916002d --- /dev/null +++ b/javalib/src/main/scala/java/io/ByteArrayOutputStream.scala @@ -0,0 +1,62 @@ +package java.io + +import scala.scalajs.js + +import scala.annotation.tailrec + +class ByteArrayOutputStream(initBufSize: Int) extends OutputStream { + + protected var buf: Array[Byte] = new Array(initBufSize) + protected var count: Int = 0 + + def this() = this(32) + + override def write(b: Int): Unit = { + if (count >= buf.length) + growBuf(1) + + buf(count) = b.toByte + count += 1 + } + + override def write(b: Array[Byte], off: Int, len: Int): Unit = { + if (off < 0 || len < 0 || len > b.length - off) + throw new IndexOutOfBoundsException() + + if (count + len > buf.length) + growBuf(len) + + System.arraycopy(b, off, buf, count, len) + count += len + } + + def writeTo(out: OutputStream): Unit = + out.write(buf, 0, count) + + def reset(): Unit = + count = 0 + + def toByteArray(): Array[Byte] = { + val res = new Array[Byte](count) + System.arraycopy(buf, 0, res, 0, count) + res + } + + def size(): Int = count + + override def toString(): String = + new String(buf, 0, count) + + def toString(charsetName: String): String = + new String(buf, 0, count, charsetName) + + override def close(): Unit = () + + private def growBuf(minIncrement: Int): Unit = { + val newSize = Math.max(count + minIncrement, buf.length * 2) + val newBuf = new Array[Byte](newSize) + System.arraycopy(buf, 0, newBuf, 0, count) + buf = newBuf + } + +} |